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Chapter 12: Air Pollution

Jul 14, 2014

570 likes | 1.57k Views

Chapter 12: Air Pollution. A brief history of air pollution Types and sources of air pollutants Factors that affect air pollution Air pollution and the urban environment Acid deposition. A Brief History of Air Pollution. London’s historical problems King Edward I forbid sea coal in 1273

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Presentation Transcript

Chapter 12: Air Pollution • A brief history of air pollution • Types and sources of air pollutants • Factors that affect air pollution • Air pollution and the urban environment • Acid deposition

A Brief History of Air Pollution • London’s historical problems • King Edward I forbid sea coal in 1273 • London known for “pea-soup” (dangerous) • One “pea-soup” incident caused 700 deaths • Term “smog” created around 1911 • Disastrous London smog event of 1952 • Winds died, smog settled over London • People could see where they were walking for 5 days • Killed 5,000 lives • Caused Parliament to pass Clean Air Act of 1956

A Brief History of Air Pollution • Donora, Pennsylvania pollution episode, 1948 • Pollution trapped in Monongahela River Valley by inversion (20 people died) • U.S. Clean air act, 1970, 1990 • Due to high pollution, Congress passed Clear Air Act (revised in 1977, 1990) • Sets emission standards • Incentives for companies to lower emission

Principal Air Pollutants • Primary pollutants • Enter atmosphere directly • Secondary pollutants • Enter atmosphere from chemical reactions • Globally, a large percentage of air pollution sources are natural. Within localized areas, however, human-caused sources are often the largest contributors.

Principal Air Pollutants • Particulate matter – solid particles and liquid droplets small enough to remain suspended (aerosols). • Not poisonous - soot, smoke, dust, pollen • More dangerous – asbestos, arsenic, oil, sulfuric acid • PM10 – Particulates with diameters < 10 micrometers • Small enough to penetrate into lungs • Can remain in air for long time • Wind can carry great distances • Asian dust can transport dust long distances

Principal Air Pollutants

Principal Air Pollutants • PM2.5 – Particulates with diameters < 2.5 micrometers • Penetrate farther into lungs • Found in diesel soot and are carcinogenic (school buses, traffic corridors) • Removed by rain, snow, ice crystals

Principal Air Pollutants • Carbon Monoxide – major pollutant in cities. Colorless, odorless, poisonous gas • 60 million metric tons enter U.S. air annually. Half from highway vehicles. • Extremely dangerous and can kill quickly in poorly ventilated areas.

Principal Air Pollutants • Sulfur dioxide – comes from sulfur-containing fossil fuels. Colorless. Comes from power plants, heating devices, paper mills, volcanoes • Can form into secondary pollutants (sulfur trioxide, sulfuric acid • Hurt breathing and certain plants

Principal Air Pollutants • Volatile organic compounds – organic compounds mainly made of hydrogen and carbon • Methane, benzene, formaldehyde, chlorofluorocarbans • Nitrogen oxides – formed when nitrogen combines with oxygen during fuel combustion • Nitrogen dioxide, nitric oxide (NOx) • Vehicles, power plants, garbage dumps • Along with ozone, VOCs and NOx are major components of photochemical smog.

Ozone in the Troposphere • Photochemical smog – formed when chemical reaction takes place with sunlight • Ozone – Dangerous at surface. Irritates eyes, lungs. Can cause asthma and bronchitis • Causes several billions of dollars in loss from crop yield • Photochemical smog is a problem on most major cities of the world.

Ozone in the Troposphere

Ozone in the Stratosphere • Relationship to ultraviolet radiation • Ozone layer shields surface from UV radiation • UV can cause skin cancer • Eye cataracts • Hurt immune system

Ozone in the Stratosphere • Ozone broken down into O2 and O when UV hits it • Chloroflucarbons (CFCs) where used in hairsprays, deodorants, propellants until 1987 (Montreal Protocol) • Stable at surface, enter stratosphere from t-storms, near jet streams

Ozone in the Stratosphere • Sunlight breaks off the Chlorine and it breaks up ozone • CFCs are very long-lasting • One CFC can destroy 100,000 Ozone molecules

Ozone in the Stratosphere

Air Pollution: Trends and Patterns • Primary air quality standards – standards set up to protect human health • secondary air quality standards- standards set up to protect visibility, crops, and buildings • Nonattainment areas – areas that do no meet air quality standards • Secondary air pollutants are particularly difficult to control, because they are not emitted directly into the atmosphere.

Air Pollution: Trends and Patterns • 80 millions Americans breathing air not meeting one standard • Air Quality Index (AQI) – includes carbon monoxide, sulfur dioxide, nitrogen dioxide, particulate matter, ozone • Highest pollutant is one used in index • Anything higher than 100 is unhealthy

Fig. 12-11, p. 338

The Role of the Wind

The Role of the Wind • Dilution – mixing air pollution in a greater volume of air. Can create problems downwind • “Dilution is the solution to pollution” - in the 1950s this motto led to the construction of tall smokestacks for large factories. Pollution was released higher in the atmosphere where winds were stronger. Air quality improved locally but suffered downwind.

The Role of Stability and Inversions • Temperature lapse rates • Inversions inhibit vertical movement. Keep pollutants in a layer • Mixing depth – the depth of the mixing layer (the layer from the surface to the top of the inversion) • The mixing layer can often be easily seen from an airplane.

The Role of Stability and Inversions

The Role of Topography • Cold air drainage – air drains downhill over night, carrying pollutants • Air blockage by mountain ranges. Mountains block the progress of flow. Blocks pollutants from moving out of the region

The Role of Topography

Severe Air Pollution Potential • Many sources (clustered close together) • High pressure (becomes stationary, light winds) • Inversions (inhibits vertical movement) • Stagnation (pollutants unable to disperse) • Valley (pollutants accumulate) • Some locations, like Los Angeles and Mexico City, have an unfortunate combination of surrounding topography, frequent inversions, abundant emissions and plentiful sunlight - perfect conditions for photochemical smog.

Air Pollution and the Urban Environment • Urban heat island – cities are warmer than rural areas • Country breeze – Return breeze in circulation

Acid Deposition • Dry deposition – when pollutants slowly settle to ground • Wet deposition – when pollutants are carried to ground by rain, snow • Acid rain effects • Strangely enough, an acidified lake looks crystal clear and beautiful. But the beauty is false; it’s only clear because nothing is alive in it.

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Chapter 20 Water Pollution tutorial by Paul Rich

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Chapter 16: Air Pollution

Chapter 16: Air Pollution. 16.2 Natural Sources Of Air Pollution. Natural Combustion Decay Biological Emissions Chemical Particulate (spores, pollen, etc.) Wind-blown dust Volcanic. 16.3 Human-caused Air Pollution. We categorize pollutants according to their source

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Air and Air Pollution. G. Tyler Miller’s Living in the Environment 13 th Edition Chapter 17. Dr. Richard Clements Chattanooga State Technical Community College. Key Concepts. Structure and composition of the atmosphere. Types and sources of outdoor air pollution.

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Indoor Air Pollution Chapter 20, Section 5

Indoor Air Pollution Chapter 20, Section 5. Indoor air pollution. Indoor air contains higher concentrations of pollutants than outdoor air 6,000 people die per day from indoor air pollution The average U.S. citizen spends 90% of the time indoors

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Chapter 5 Air and Water Resources

Chapter 5 Air and Water Resources. Finding Pollution Solutions Section 3 Notes 5-4. Reducing Air Pollution. Clean Air Act : development of air pollution control technologies Scrubbe r: removes pollutants from air with a stream of water droplets

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Air pollution

Air pollution. Supervision P rof. Dr. Mervat Salah. Outcomes. 1-To know the meaning of air pollution 2-To differentiate between outdoor and indoor pollution 3-To know types of air pollution 4-To understand the ways to control air pollution. AIR POLLUTION.

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Pollution. Types of Pollution. Air pollution Water pollution Noise pollution. Causes of air pollution. Water pollution. Human waste Waste from factories Washing of vehicles. Causes of Noise Pollution. Effects of pollution. THANK YOU.

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Chapter 15 Air Pollution and Stratospheric Ozone Depletion

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CHAPTER 7: ENVIRONMENTAL IMPACTS

CHAPTER 7: ENVIRONMENTAL IMPACTS. Lesson 4: Impacts on the atmosphere. ??. Essential Questions. What are some types of air pollution ? How are global warming and the carbon cycle related ? How does air pollution affect human health ? What actions help prevent air pollution ?.

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Chapter 19 Air Pollution

Chapter 19 Air Pollution. Atmosphere as a Resource. Atmospheric Composition N: 78.08% O: 20.95% Ar : 0.93% CO 2 : 0.04% Ecosystem services Blocks UV radiation Moderates the climate Redistributes water. Air Pollution - Terminology. Air Pollution

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Pollution Control: Targets

Pollution Control: Targets. READING Perman et al (2 nd edition): Chapter 11. THE ECONOMIC ANALYSIS OF POLLUTION * How does pollution arise? * What is the &quot;best&quot; level of pollution? * What policy instruments are available to achieve any pollution target?

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Water Pollution

Water Pollution. KIJ Y - AL LEN. Types of water pollution. Surface water pollution Groundwater pollution Microbiological pollution Oxygen Depletion pollution Chemical Nutrients Suspended matter. Glossary. Turbidity-The cloudiness or haziness of a fluid caused by individual particles.

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Chapter 12: Air 12-1 What Causes Air Pollution

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What Causes Pollution

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Chapter 14 Water Pollution

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Pollution. Pollution can be anything that is added to the environment that hurts it Pollution can cause people, animals, and plants to get sick or die. Types of Pollution. There are four major types: Water pollution Air pollution Land pollution Scenic pollution Noise pollution.

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Chapter: Air Pollution

Table of Contents. Chapter: Air Pollution. Section 1: Types and Causes of Air Pollution. Section 2: Effects of Air Pollution. Section 3: Solutions to Air Pollution. Types and Causes of Air Pollution. 1. What causes air pollution?.

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Air Pollution Powerpoint

Subject: Primary science

Age range: 5-7

Resource type: Lesson (complete)

Last updated

25 October 2023

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The presentation contains 22 slides: What is Air pollution ? The types of air pollutants. Sources of air pollution. Natural Sources. Human Sources. Effects of air pollution on humans. Smog. Effects of Smog. Chlorofluorocarbons. Sources of chlorofluorocarbons. Ozone Layer. Hole in the ozone layer. Effects of Ozone depletion. Acid Rain. Marble Cancer. Greenhouse Effect. Consequences of Global warming.

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Air Quality Index Analysis (AQI)

It seems that you like this template, air quality index analysis (aqi) presentation, free google slides theme and powerpoint template.

Keeping track of air quality is not just a luxury, it's a necessity. This is where our Air Quality Index Analysis (AQI) comes in. This professional and modern tool is designed to deliver precise real-time data about air pollution. Present all about it with a sophisticated template that fits its topic. Write how this analysis tool pulls together comprehensive air quality data, ensuring our environment is safe and healthy and let the gradient professional design do its magic. The mix of your information about AQI and this template will be perfect for your next presentation!

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There are two major classes of firefighting foam: Class A and Class B. Class B is also called Aqueous film forming foam (AFFF) and is usually created using PFAS. It is a highly effective foam used for fighting high-hazard flammable liquid fires, like gasoline, oil, and jet fuel.

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MDHHS recommends Michigan residents and visitors avoid foam on waterbodies

May 24, 2024

LANSING, Mich. – With summer approaching, the Michigan Department of Health and Human Services (MDHHS) recommends residents and visitors avoid foam on Michigan waterbodies such as lakes, rivers and streams.

Foam can form on any waterbody. Natural foam is usually off-white and/or brown, can have an earthy or fishy scent, and tends to pile up in bays, eddies or at river barriers, such as dams.

Sometimes foam can contain harmful chemicals or bacteria. This can include high levels of per- and polyfluoroalkyl substances (PFAS). PFAS-containing foam is usually bright white in color, lightweight and can pile up along shores or blow onto beaches. Some studies have found that high exposure to some PFAS is linked to high cholesterol and liver damage, among other health effects.

If you touch any foam, rinse off or bathe as soon as possible. This is especially true if the water is suspected to be contaminated with PFAS. Touching foam without rinsing off or bathing can lead to accidentally swallowing foam and its contents.

“Science tells us that the risk of PFAS entering your body through your skin is low, but you can accidentally swallow PFAS and other chemicals or bacteria if you do not rinse off or bathe after touching foam,” said Dr. Natasha Bagdasarian, chief medical executive. “Rinsing off or bathing after water activities will help protect people from chemicals and bacteria that may be in foam or water.”

The Michigan Department of Agriculture and Rural Development (MDARD) recommends that people do not allow their animals to touch or swallow foam on waterbodies. Animals are at risk of swallowing foam that has built up in their fur when grooming themselves. If animals touch foam, they should be rinsed off and bathed with fresh water. Pet owners with questions related to animals and foam should contact their veterinarian.

Anyone with questions about exposure to PFAS or foam can call the MDHHS Environmental Health Hotline at 800-648-6942. More information is available on the MPART website.

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Mdhhs releases second north kent county pfas report, state of michigan reminds hunters of ‘do not eat health’ advisories for clark’s marsh.

With hunting season underway, the Michigan departments of Health and Human Services (MDHHS) and Natural Resources (MDNR) are reminding hunters not to eat venison from deer taken within three miles of Clark’s Marsh in Oscoda Township in Iosco County.

Michigan releases 2023 Eat Safe Fish Guides to help residents learn about and plan for local fish consumption

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The Michigan Department of Environment, Great Lakes, and Energy (EGLE) has established a new Water Quality Value (WQV) for perfluorobutane sulfonic acid (PFBS) and has revised the existing WQV for perfluorooctanoic acid (PFOA). Following the risk assessment method provided in Rule 323.1057 (“Rule 57”), a PFBS concentration of 670,000 parts per trillion (ppt; or nanograms per liter) was set for surface water to be broadly protective of human health and 8,300 ppt for surface water specifically protected as a drinking water source. The revised human health values for PFOA are 170 ppt for surface water (from 12,000 ppt previously) and 66 ppt for surface water protected as a drinking water source (from 420 ppt, previously).

MDHHS recommends Michiganders to avoid foam on waterbodies

Michigan releases 2022 eat safe fish guides to help residents learn about and plan for local fish consumption.

These guides can help Michiganders plan their fish consumption to minimize exposure to chemicals that can build up in fish, while still getting all the health benefits of eating fish. The regional Eat Safe Fish Guides provide guidelines for eating locally caught fish. Guidelines are based on levels of chemicals found in the portions of fish that people eat – typically the filets. Test results from the MDHHS Bureau of Laboratories are used to determine what is safe for people to eat over the long-term. There are many health benefits to eating fish and the Eat Safe Fish Guides help individuals choose the fish that are best for them and their families.